1Z0-460 | how many questions of 1Z0-460 dumps?
Q1. You have successfully installed the uptrack tool on servers you will be using ksplice kernel updates. Which two options are correct descriptions of commands you can run?
A. “uptrack-show”: list the active Oracle Ksplice updates in your running kernel.
B. “uptrack-upgrade”: connect to the Uptrack update server, check and apply new updates when available.
C. “uptrack-upgrade”: connect to the Uptrack update server, check and download a new update to the uptrack tool.
D. “uptrack-show <key>”: list the servers that have the uptrack tool installed using the current key.
Answer: A,B
Explanation: A:uptrack-show
You can see what updates have been installed by running uptrack-show:
B:uptrack-upgrade
Ksplice updates are the same security and bugfix updates you would get from your Linux vendor, packaged in a special rebootless form. To apply Ksplice updates, just runuptrack-upgrade.
Q2. Which two conditions will cause OCFS2 to evict a node?
A. When a node no longer responds to network heartbeat signals from other members of the cluster
B. When storage array is at 90% capacity
C. When access to storage is lost
D. When a node is running at 90% utilization
Answer: A,C
Explanation: A:How does the disk heartbeat work? Every node writes every two secs to its block in the heartbeat system file. The block offset is equal to its global node number. So node 0 writes to the first block, node 1 to the second, etc. All the nodes also read the heartbeat sysfile every two secs. As long as the timestamp is changing, that node is deemed alive.
Q3. The Oracle “helper” package (RPM), formerly known as “Oracle-validated” (which helps meet prerequisites for installing Oracle software), has been renamed. What is the new name?
A. Oracle-11gR2-validated
B. Oracle-11fR2-valid_package
C. Oracle-rdbms-server-11gR2-preinstall
D. Oracle-11gR2-preinstall
Answer: C
Explanation: Now that the certification of the Oracle Database 11g R2 with Oracle Linux 6 and the Unbreakable Enterprise Kernel has been announced, we are glad to announce the availability oforacle-rdbms-server-11gR2-preinstall, the Oracle RDBMS Server 11gR2 Pre-install RPM package (formerly known as oracle-validated). Designed specifically for Oracle Linux 6, this RPM aids in the installation of the Oracle Database.
Reference:Oracle RDBMS Server 11gR2 Pre-Install RPM for Oracle Linux 6 has been released
Q4. Which two features are available with the Unbreakable kernel R2, but not with the Red Hat Compatible Kernel?
A. Oracle Clusterware for Linux
B. Up to 4-petabyte cluster volumes with OCFS2
C. Ksplice zero downtime patching
D. Transparent Huge Pages support (that is, 2 MB instead of 4 KB)
Answer: A,B
Explanation: Oracle’s Unbreakable Enterprise Kernel KEY FEATURES: *Modern kernel based on 2.6.32, optimized by Oracle for server deployments *Includes OCFS(Oracle Cluster File System)2 1.6 for clustered volumes *Includes OFED 1.5.1 *Advanced NUMA support *New diagnostic and tracing tools, including performance counters *Complete data integrity checking from application to disk *Hardware fault management
Q5. Examine the sar command below. Your Oracle Linux system has one CPU. What does the runq-sz column of this output convey about your system?
A. CPU is bottleneck because the run queue size is greater than the number of CPUs on your system.
B. The average of three processes are only using the CPU on your system and hence the CPU is not a bottleneck.
C. CPU is not a bottleneck because the run queue size indicates the number of CPU bound processes on your system.
D. CPU is a bottleneck because the run queue size indicates that adequate memory is not allocated.
Answer: A
Explanation: *Use the sar -q command to report the following information:
The Average queue length while the queue is occupied.
The percentage of time that the queue is occupied.
*The following list describes the output from the -q option.
runq-sz
The number of kernel threads in memory that are waiting for a CPU to run. Typically, this value should be less than 2. Consistently higher values mean that the system might be CPU-bound.
%runocc
The percentage of time that the dispatch queues are occupied.
swpq-sz
Swap queue of processes for the sar command.
%swpocc
Swap queue of processes for the sar command.
Q6. The sshd service running and you execute the following command:
# chkconfig sshd off
What happens when you run this chkconfig command?
A. The sshd service disabled only for runlevel 5.
B. The sshd service id disabled for runlevels 2, 3, 4, and 5, but the ssh service is still available until the next reboot.
C. The sshd service is disabled for runlevels 2, 3, 4, and 5 and ssh service is stopped.
D. The sshd service is disabled only for current runlevel.
Answer: B
Q7. Examine the following commands: # groupadd project # mkdir /usr/share/project # chown –R root.project /usr/share/project # qpasswd –a scott project
# qpasswd –a foo project
# chmod 2775 /usr/share/project
Based on the commands, which statement is correct?
A. Any new file created in the /usr/share/project folder by user scott will not be possible for foo to modify it.
B. All members of the project group need the administrator’s help to change the file permission every time users write new files in the /usr/share/project folder.
C. Files created by all members of the project group in the /usr/share/project folder will get the same group permission as the folder itself.
D. The chmod command can only take a tree-digit argument.
Answer: A
Explanation: *Apermission of "2755" for a directory means that everyone has read and execute
permission, while the file owner and members of the file's group additionally have write
permission. And any files or subdirectories created in that directory will inherit the parent
directory's group id.
Incorrect:
Not D: chmod 2775 is a valid command.
Q8. Which two statements are correct about the Oracle ASMLib library?
A. Oracle ASMLib is an optional support library for the Automatic Storage Management (ASM) feature.
B. To use ASMLib library, you have to recompile it first for the Unbreakable Enterprise Kernel.
C. Oracle Automatic Storage management (ASM) requires Oracle ASMLib library to function completely.
D. Oracle ASMLib kernel driver is included in the Unbreakable Kernel.
Answer: A,D
Explanation: A (not C):ASMLib is an optional support library for the Automatic Storage Management feature of the Oracle Database.
ASMLib allows an Oracle Database using ASM more efficient and capable access to the disk groups it is using.
D (not B):The Oracle ASMLib kernel driver is now included in the Unbreakable Enterprise Kernel.
No driver package needs to be installed when using this kernel.
Q9. You found a message on a public discussion forum mentioning a Vulnerability (for example, CVE-2006-5794), which could affect some versions of OpenSSH in Linux distribution. Identify the command that would allow you to see whether this CVE has been applied.
A. rpm –q – – changelogopenssh| grep 5794
B. yum listcvew openssh
C. rpm -qa | grep openssh | grep 5794
D. yum sec-list cves
Answer: A
Explanation: *The command rpm -q --changelog rpm displays a detailed list of information (updates, configuration, modifications, etc.) about a specific package. This example shows information about the package rpm. However, only the last five change entries in the RPM database arelisted. All entries (dating back the last two years) are included in the package itself. This query only works if CD 1 is mounted at /media/cdrom:
rpm -qp --changelog /media/cdrom/suse/i586/rpm-3*.rpm
*Is the patch RPM suitable for my system?
To check this, first query the installed version of the package. For pine, this can be done with
rpm -q pine
pine-4.44-188
Incorrect:
not C:
*qa stands for "Query All"
Assuming you are attempting to find out if you have the Very Secure FTP Daemon installed, you
want:
rpm -qa | grep vsftp
rpm -qa will show you all installed RPMs, piping it through grep will limit the list to RPMs
containing the string "vsftp".
Q10. Examine the output of the yum.conf configuration file from o Oracle Linux 6 server.
What does the “installonly_limit=3” option mean?
A. Only three users can use the yum command simultaneously to install package on Oracle Linux 6 server.
B. Only three Linux packages can be installed in one invocation of the yum command.
C. Only three repository channels can be used for installing Linux packages.
D. Only three versions of packages listed in installonlypkgs can be installed simultaneously.
Answer: D
Explanation: installonly_limit Number of packages listed in installonlypkgs to keep installed at the same time. Setting to 0 disables this feature. Default is '3'. Note that this functionality used to be in the "installonlyn" plugin, where this option was altered via. tokeep. Note that as of version 3.2.24, yum will now look in the yumdb for a installonly attribute on installed packages. If that attribute is "keep", then they will never be removed.
Reference:yum.conf